Reduce lint

*** 1206,1216 ****
  
          /*
           * This thread should receive SIGHUP so that it can close the log
           * file, and reopen it, during log rotation.
           */
!         sigset(SIGHUP, hup_handler);
          (void) sigfillset(&blockset);
          (void) sigdelset(&blockset, SIGHUP);
          (void) thr_sigsetmask(SIG_BLOCK, &blockset, NULL);
  
          if (!shutting_down) {
--- 1206,1216 ----
  
          /*
           * This thread should receive SIGHUP so that it can close the log
           * file, and reopen it, during log rotation.
           */
!         (void) sigset(SIGHUP, hup_handler);
          (void) sigfillset(&blockset);
          (void) sigdelset(&blockset, SIGHUP);
          (void) thr_sigsetmask(SIG_BLOCK, &blockset, NULL);
  
          if (!shutting_down) {
*** 1382,1391 ****
--- 1382,1392 ----
  
  done:
          zonecfg_fini_handle(handle);
  }
  
+ /* ARGSUSED -- "id" might be used in the future. */
  void
  create_log_thread(zlog_t *logp, zoneid_t id)
  {
          int res;